diff -uNr ffmpeg-3.3_orig/configure ffmpeg-3.3_dash_demux/configure
--- ffmpeg-3.3_orig/configure 2016-12-06 00:28:58.000000000 +0100
+++ ffmpeg-3.3_dash_demux/configure 2017-10-22 14:30:41.170550486 +0200
@@ -292,6 +292,7 @@
--disable-securetransport disable Secure Transport, needed for TLS support
on OSX if openssl and gnutls are not used [autodetect]
--disable-xlib disable xlib [autodetect]
+ --disable-xml2 disable XML parsing using the C library libxml2 [autodetect]
--disable-zlib disable zlib [autodetect]
The following libraries provide various hardware acceleration features:
@@ -1497,6 +1498,7 @@
sdl2
securetransport
xlib
+ xml2
zlib
"
@@ -2916,6 +2918,7 @@
caf_demuxer_select="iso_media riffdec"
caf_muxer_select="iso_media"
dash_muxer_select="mp4_muxer"
+dash_demuxer_select="xml2"
dirac_demuxer_select="dirac_parser"
dts_demuxer_select="dca_parser"
dtshd_demuxer_select="dca_parser"
@@ -5730,6 +5733,7 @@
disabled zlib || check_lib zlib.h zlibVersion -lz || disable zlib
disabled bzlib || check_lib bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
disabled lzma || check_lib lzma.h lzma_version_number -llzma || disable lzma
+disabled xml2 || check_lib libxml/xmlversion.h xmlCheckVersion -lxml2 || disable xml2
check_lib math.h sin -lm && LIBM="-lm"
disabled crystalhd || check_lib "stdint.h libcrystalhd/libcrystalhd_if.h" DtsCrystalHDVersion -lcrystalhd || disable crystalhd
diff -uNr ffmpeg-3.3_orig/libavformat/allformats.c ffmpeg-3.3_dash_demux/libavformat/allformats.c
--- ffmpeg-3.3_orig/libavformat/allformats.c 2016-12-06 00:28:54.000000000 +0100
+++ ffmpeg-3.3_dash_demux/libavformat/allformats.c 2017-10-22 14:30:41.170550486 +0200
@@ -96,7 +96,7 @@
REGISTER_DEMUXER (CINE, cine);
REGISTER_DEMUXER (CONCAT, concat);
REGISTER_MUXER (CRC, crc);
- REGISTER_MUXER (DASH, dash);
+ REGISTER_MUXDEMUX(DASH, dash);
REGISTER_MUXDEMUX(DATA, data);
REGISTER_MUXDEMUX(DAUD, daud);
REGISTER_DEMUXER (DCSTR, dcstr);
diff -uNr ffmpeg-3.3_orig/libavformat/dashdec.c ffmpeg-3.3_dash_demux/libavformat/dashdec.c
--- ffmpeg-3.3_orig/libavformat/dashdec.c 1970-01-01 01:00:00.000000000 +0100
+++ ffmpeg-3.3_dash_demux/libavformat/dashdec.c 2017-10-22 16:09:40.837356820 +0200
@@ -0,0 +1,2065 @@
+/*
+ * Dynamic Adaptive Streaming over HTTP demux
+ * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+ /* Code prepared for ffmpeg 2.8.9 and then ported to ffmpeg 3.3
+ * At now it allow to play one selected representation for audio and video components.
+ *
+ */
+
+/**
+ * @file
+ */
+#include "libavutil/avstring.h"
+#include "libavutil/avassert.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/dict.h"
+#include "libavutil/time.h"
+#include "avformat.h"
+#include "internal.h"
+#include "avio_internal.h"
+#include "url.h"
+#include "id3v2.h"
+
+#define INITIAL_BUFFER_SIZE 32768
+
+/////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
+#include <time.h>
+#include <unistd.h>
+#include <string.h>
+
+static struct tm* ResolveUTCDateTime(const char *dateTimeString)
+{
+ time_t rawtime;
+ struct tm* timeInfo = NULL;
+ int y = 0;
+ int M = 0;
+ int d = 0;
+ int h = 0;
+ int m = 0;
+ float s = 0.0;
+
+ /* ISO-8601 date parser */
+
+ if (dateTimeString == NULL || '\0' == dateTimeString[0])
+ return NULL;
+
+
+ time ( &rawtime );
+ timeInfo = gmtime ( &rawtime );
+
+ sscanf(dateTimeString, "%d-%d-%dT%d:%d:%fZ", &y, &M, &d, &h, &m, &s);
+
+ timeInfo->tm_year = y - 1900;
+ timeInfo->tm_mon = M - 1;
+ timeInfo->tm_mday = d;
+
+ timeInfo->tm_hour = h;
+ timeInfo->tm_min = m;
+ timeInfo->tm_sec = (int)s;
+
+ return timeInfo;
+}
+
+static struct tm* GetCurrentUTCTime(void)
+{
+ time_t rawTime;
+ time(&rawTime);
+ return gmtime(&rawTime);
+}
+
+static uint32_t GetCurrentTimeInSec(void)
+{
+ return (uint32_t)mktime(GetCurrentUTCTime());
+}
+
+static uint32_t GetUTCDateTimeInSec(const char *datetime)
+{
+ return (uint32_t)mktime(ResolveUTCDateTime(datetime));
+}
+
+static uint32_t GetDurationInSec(const char *duration)
+{
+ /* ISO-8601 duration parser */
+
+ uint32_t days = 0;
+ uint32_t hours = 0;
+ uint32_t mins = 0;
+ uint32_t secs = 0;
+
+ const char *ptr = duration;
+ while(*ptr)
+ {
+ float value = 0;
+ uint32_t charsRead;
+ char type = '\0';
+
+ if(*ptr == 'P' || *ptr == 'T')
+ {
+ ptr++;
+ continue;
+ }
+
+ if(sscanf(ptr, "%f%c%n", &value, &type, &charsRead) != 2) {
+ return 0; /* parser error */
+ }
+ switch(type) {
+ case 'D':
+ days = (uint32_t)value;
+ break;
+ case 'H':
+ hours = (uint32_t)value;
+ break;
+ case 'M':
+ mins = (uint32_t)value;
+ break;
+ case 'S':
+ secs = (uint32_t)value;
+ break;
+ default:
+ // handle invalid type
+ break;
+ }
+ ptr += charsRead;
+ }
+ return ((days * 24 + hours) * 60 + mins) * 60 + secs;
+}
+//###########################################################################
+
+struct segment {
+ //int64_t duration;
+ int64_t url_offset;
+ int64_t size;
+ char *url;
+};
+
+struct timeline {
+ int64_t t;
+ int32_t r;
+ int64_t d;
+};
+
+enum RepType {
+ REP_TYPE_UNSPECIFIED,
+ REP_TYPE_AUDIO,
+ REP_TYPE_VIDEO
+};
+
+enum TemUrlType {
+ TMP_URL_TYPE_UNSPECIFIED,
+ TMP_URL_TYPE_NUMBER,
+ TMP_URL_TYPE_TIME
+};
+
+/*
+ * Each playlist has its own demuxer. If it currently is active,
+ * it has an open AVIOContext too, and potentially an AVPacket
+ * containing the next packet from this stream.
+ */
+struct representation {
+ char *url_template;
+ char *url_template_pattern;
+ char *url_template_format;
+ enum TemUrlType tmp_url_type;
+ AVIOContext pb;
+ AVIOContext *input;
+ AVFormatContext *parent;
+ AVFormatContext *ctx;
+ AVPacket pkt;
+ int rep_idx;
+ int rep_count;
+ int stream_index;
+
+ enum RepType type;
+ int64_t target_duration;
+
+ int n_segments;
+ struct segment **segments; /* VOD list of segment for profile */
+
+ int n_timelines;
+ struct timeline **timelines;
+
+ int64_t first_seq_no;
+ int64_t last_seq_no;
+ int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
+
+ int64_t segmentDuration;
+ int64_t segmentTimescalce;
+
+ int64_t cur_seq_no;
+ int64_t cur_seg_offset;
+ int64_t cur_seg_size;
+ struct segment *cur_seg;
+
+ /* Currently active Media Initialization Section */
+ struct segment *init_section;
+ uint8_t *init_sec_buf;
+ uint32_t init_sec_buf_size;
+ uint32_t init_sec_data_len;
+ uint32_t init_sec_buf_read_offset;
+
+ int fix_multiple_stsd_order;
+
+ int64_t cur_timestamp;
+ int is_restart_needed;
+};
+
+typedef struct DASHContext {
+ AVClass *class;
+
+ char *base_url;
+
+ struct representation *cur_video;
+ struct representation *cur_audio;
+
+ uint32_t mediaPresentationDurationSec;
+
+ uint32_t suggestedPresentationDelaySec;
+ uint32_t presentationDelaySec;
+ uint32_t availabilityStartTimeSec;
+ uint32_t publishTimeSec;
+ uint32_t minimumUpdatePeriodSec;
+ uint32_t timeShiftBufferDepthSec;
+ uint32_t minBufferTimeSec;
+
+ uint32_t periodDurationSec;
+ uint32_t periodStartSec;
+
+ int is_live;
+
+ int audio_rep_index;
+ int video_rep_index;
+
+ AVIOInterruptCB *interrupt_callback;
+ char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
+ char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
+ char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
+ AVDictionary *avio_opts;
+} DASHContext;
+
+
+static void free_segment(struct segment **seg)
+{
+ if (!seg || !(*seg)) {
+ return;
+ }
+
+ av_freep(&(*seg)->url);
+ av_freep(seg);
+}
+
+static void free_segment_list(struct representation *pls)
+{
+ int i;
+ for (i = 0; i < pls->n_segments; i++) {
+ av_freep(&pls->segments[i]->url);
+ av_freep(&pls->segments[i]);
+ }
+ av_freep(&pls->segments);
+ pls->n_segments = 0;
+}
+
+static void free_timelines_list(struct representation *pls)
+{
+ int i;
+ for (i = 0; i < pls->n_timelines; i++) {
+ av_freep(&pls->timelines[i]);
+ }
+ av_freep(&pls->timelines);
+ pls->n_timelines = 0;
+}
+
+/*
+ * Used to reset a statically allocated AVPacket to a clean slate,
+ * containing no data.
+ */
+static void reset_packet(AVPacket *pkt)
+{
+ av_init_packet(pkt);
+ pkt->data = NULL;
+}
+
+static void free_representation(struct representation *pls)
+{
+ free_segment_list(pls);
+ free_timelines_list(pls);
+ free_segment(&pls->cur_seg);
+ free_segment(&pls->init_section);
+ av_freep(&pls->init_sec_buf);
+ av_packet_unref(&pls->pkt);
+ reset_packet(&pls->pkt);
+ av_freep(&pls->pb.buffer);
+ if (pls->input)
+ ff_format_io_close(pls->parent, &pls->input);
+ if (pls->ctx) {
+ pls->ctx->pb = NULL;
+ avformat_close_input(&pls->ctx);
+ }
+
+ av_free(pls->url_template_pattern);
+ av_free(pls->url_template_format);
+ av_free(pls->url_template);
+ av_free(pls);
+}
+
+static void update_options(char **dest, const char *name, void *src)
+{
+ av_freep(dest);
+ av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
+ if (*dest && !strlen(*dest))
+ av_freep(dest);
+}
+
+static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
+ AVDictionary *opts, AVDictionary *opts2, int *is_http)
+{
+ DASHContext *c = s->priv_data;
+ AVDictionary *tmp = NULL;
+ const char *proto_name = NULL;
+ int ret;
+
+ av_dict_copy(&tmp, opts, 0);
+ av_dict_copy(&tmp, opts2, 0);
+
+ if (!proto_name)
+ proto_name = avio_find_protocol_name(url);
+
+ if (!proto_name)
+ return AVERROR_INVALIDDATA;
+
+ // only http(s) & file are allowed
+ if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL))
+ return AVERROR_INVALIDDATA;
+ if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
+ ;
+ else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
+ return AVERROR_INVALIDDATA;
+
+ ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
+ if (ret >= 0) {
+ // update cookies on http response with setcookies.
+ void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
+ update_options(&c->cookies, "cookies", u);
+ av_dict_set(&opts, "cookies", c->cookies, 0);
+ }
+
+ av_dict_free(&tmp);
+
+ if (is_http)
+ *is_http = av_strstart(proto_name, "http", NULL);
+
+ return ret;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>
+
+#if (__STDC_VERSION__ >= 199901L)
+#include <stdint.h>
+#endif
+
+//http://creativeandcritical.net/str-replace-c
+
+static char *repl_str(const char *str, const char *from, const char *to)
+{
+ /* Adjust each of the below values to suit your needs. */
+
+ /* Increment positions cache size initially by this number. */
+ size_t cache_sz_inc = 16;
+ /* Thereafter, each time capacity needs to be increased,
+ * multiply the increment by this factor. */
+ const size_t cache_sz_inc_factor = 3;
+ /* But never increment capacity by more than this number. */
+ const size_t cache_sz_inc_max = 1048576;
+
+ char *pret, *ret = NULL;
+ const char *pstr2, *pstr = str;
+ size_t i, count = 0;
+ #if (__STDC_VERSION__ >= 199901L)
+ uintptr_t *pos_cache_tmp, *pos_cache = NULL;
+ #else
+ ptrdiff_t *pos_cache_tmp, *pos_cache = NULL;
+ #endif
+ size_t cache_sz = 0;
+ size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from);
+
+ /* Find all matches and cache their positions. */
+ while ((pstr2 = strstr(pstr, from)) != NULL) {
+ count++;
+
+ /* Increase the cache size when necessary. */
+ if (cache_sz < count) {
+ cache_sz += cache_sz_inc;
+ pos_cache_tmp = realloc(pos_cache, sizeof(*pos_cache) * cache_sz);
+ if (pos_cache_tmp == NULL) {
+ goto end_repl_str;
+ } else pos_cache = pos_cache_tmp;
+ cache_sz_inc *= cache_sz_inc_factor;
+ if (cache_sz_inc > cache_sz_inc_max) {
+ cache_sz_inc = cache_sz_inc_max;
+ }
+ }
+
+ pos_cache[count-1] = pstr2 - str;
+ pstr = pstr2 + fromlen;
+ }
+
+ orglen = pstr - str + strlen(pstr);
+
+ /* Allocate memory for the post-replacement string. */
+ if (count > 0) {
+ tolen = strlen(to);
+ retlen = orglen + (tolen - fromlen) * count;
+ } else retlen = orglen;
+ ret = av_malloc(retlen + 1);
+ if (ret == NULL) {
+ goto end_repl_str;
+ }
+
+ if (count == 0) {
+ /* If no matches, then just duplicate the string. */
+ strcpy(ret, str);
+ } else {
+ /* Otherwise, duplicate the string whilst performing
+ * the replacements using the position cache. */
+ pret = ret;
+ memcpy(pret, str, pos_cache[0]);
+ pret += pos_cache[0];
+ for (i = 0; i < count; i++) {
+ memcpy(pret, to, tolen);
+ pret += tolen;
+ pstr = str + pos_cache[i] + fromlen;
+ cpylen = (i == count-1 ? orglen : pos_cache[i+1]) - pos_cache[i] - fromlen;
+ memcpy(pret, pstr, cpylen);
+ pret += cpylen;
+ }
+ ret[retlen] = '\0';
+ }
+
+end_repl_str:
+ /* Free the cache and return the post-replacement string,
+ * which will be NULL in the event of an error. */
+ free(pos_cache);
+ return ret;
+}
+
+static int get_repl_pattern_and_format(const char *i_url, const char *i_marker, char **o_pattern, char **o_format)
+{
+ int ret = -1;
+
+ if (NULL != strstr(i_url, i_marker)) {
+ *o_pattern = av_strdup(i_marker);
+ *o_format = av_strdup("%"PRId64);
+ ret = 0;
+ } else {
+ char *prefix = NULL;
+ char *start = NULL;
+ char *end = NULL;
+ int marker_len = 0;
+ int format_len = 0;
+
+ prefix = av_strdup(i_marker);
+ marker_len = strlen(prefix)-1;
+ prefix[marker_len] = '\0';
+
+ start = strstr(i_url, prefix);
+ if (!start)
+ goto finish;
+ end = strchr(start+1, '$');
+ if (!end)
+ goto finish;
+
+ if (start[marker_len] != '%')
+ goto finish;
+
+ if (end[-1] != 'd')
+ goto finish;
+
+ format_len = end - start - marker_len - 1 + strlen(PRId64);
+ *o_format = av_mallocz(format_len+1);
+ strncpy(*o_format, start + marker_len, end - start - marker_len -1);
+ strcat(*o_format, PRId64);
+
+ *o_pattern = av_mallocz(end - start + 2);
+ strncpy(*o_pattern, start, end - start + 1);
+
+ ret = 0;
+finish:
+ free(prefix);
+ }
+
+ return ret;
+}
+
+static char * get_content_url(xmlNodePtr *baseUrlNodes, int n_baseUrlNodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar *val)
+{
+ char *tmp_str = av_mallocz(MAX_URL_SIZE);
+ char *url = NULL;
+ int i = 0;
+
+ for (; i < n_baseUrlNodes; ++i) {
+ if (baseUrlNodes[i] && baseUrlNodes[i]->children && baseUrlNodes[i]->children->type == XML_TEXT_NODE) {
+ xmlChar *text = xmlNodeGetContent(baseUrlNodes[i]->children);
+ if (text) {
+ char *tmp_str_2 = av_mallocz(MAX_URL_SIZE);
+ ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text);
+ av_free(tmp_str);
+ tmp_str = tmp_str_2;
+ xmlFree(text);
+ }
+ }
+ }
+
+ url = tmp_str;
+
+ if (val)
+ strcat(tmp_str, (const char*)val);
+
+ if (rep_id_val) {
+ url = repl_str(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
+ av_free(tmp_str);
+ tmp_str = url;
+ }
+
+ if (rep_bandwidth_val && tmp_str){
+ char *pFormat = NULL;
+ char *pPattern = NULL;
+
+ if (0 == get_repl_pattern_and_format(tmp_str, "$Bandwidth$", &pPattern, &pFormat)) {
+ int64_t val = (int64_t)atoll((const char *)rep_bandwidth_val);
+ int size = snprintf(NULL, 0, pFormat, val); // calc needed buffer size
+ if (val > 0) {
+ char *tmp_val = av_mallocz(size + 1);
+ snprintf(tmp_val, size+1, pFormat, val);
+
+ url = repl_str(tmp_str, pPattern, tmp_val);
+ av_free(tmp_val);
+
+ av_free(tmp_str);
+ tmp_str = NULL;
+ }
+ av_free(pFormat);
+ av_free(pPattern);
+ }
+ }
+
+ if (tmp_str != url)
+ av_free(tmp_str);
+
+ return url;
+}
+
+static xmlChar * get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const xmlChar *attrName)
+{
+ int i;
+ for (i = 0; i < n_nodes; ++i) {
+ if (nodes[i]) {
+ xmlChar *val = xmlGetProp(nodes[i], attrName);
+ if (val)
+ return val;
+ }
+ }
+ return NULL;
+}
+
+static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const xmlChar *nodename)
+{
+ xmlNodePtr node = rootnode;
+ if (node == NULL) {
+ return NULL;
+ }
+
+ node = xmlFirstElementChild(node);
+ while (node != NULL) {
+
+ if (!xmlStrcmp(node->name, nodename)) {
+ return node;
+ }
+ node = xmlNextElementSibling(node);
+ }
+ return NULL;
+}
+
+static enum RepType get_content_type(xmlNodePtr node)
+{
+ enum RepType type = REP_TYPE_UNSPECIFIED;
+ if (node) {
+ int i = 0;
+ while (type == REP_TYPE_UNSPECIFIED && i < 2) {
+ const char *attr = (i == 0) ? "contentType" : "mimeType";
+ xmlChar *val = xmlGetProp(node, attr);
+ if (val) {
+ if (strstr((const char *) val, "video"))
+ type = REP_TYPE_VIDEO;
+ else if (strstr((const char *) val, "audio"))
+ type = REP_TYPE_AUDIO;
+ xmlFree(val);
+ }
+ i += 1;
+ }
+ }
+ return type;
+}
+
+static void fill_timelines(struct representation *rep, xmlNodePtr *nodes, const int n_nodes)
+{
+ int i = 0;
+ for (; i < n_nodes; ++i) {
+ if (nodes[i]) {
+ xmlNodePtr segmentTimelineNode = findChildNodeByName(nodes[i], "SegmentTimeline");
+ if (segmentTimelineNode) {
+ segmentTimelineNode = xmlFirstElementChild(segmentTimelineNode);
+ while (segmentTimelineNode) {
+ if (!xmlStrcmp(segmentTimelineNode->name, (const xmlChar *)"S")) {
+ struct timeline *tml = av_mallocz(sizeof(struct timeline));
+ xmlAttrPtr attr = segmentTimelineNode->properties;
+ while(attr) {
+ xmlChar *val = xmlGetProp(segmentTimelineNode, attr->name);
+
+ if (!xmlStrcmp(attr->name, (const xmlChar *)"t"))
+ tml->t = (int64_t)atoll((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"r"))
+ tml->r =(int32_t) atoi((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"d"))
+ tml->d = (int64_t)atoll((const char *)val);
+ attr = attr->next;
+ xmlFree(val);
+ }
+
+ dynarray_add(&rep->timelines, &rep->n_timelines, tml);
+ }
+ segmentTimelineNode = xmlNextElementSibling(segmentTimelineNode);
+ }
+ return;
+ }
+ }
+ }
+ return;
+}
+
+static int parse_mainifest(AVFormatContext *s, const char *url, AVIOContext *in)
+{
+ DASHContext *c = s->priv_data;
+ int ret = 0;
+ int close_in = 0;
+ uint8_t *new_url = NULL;
+
+ int64_t filesize = 0;
+ char *buffer = NULL;
+
+ if (!in) {
+ AVDictionary *opts = NULL;
+ close_in = 1;
+ /* This is XML mainfest there is no need to set range header */
+ av_dict_set(&opts, "seekable", "0", 0);
+
+ // broker prior HTTP options that should be consistent across requests
+ av_dict_set(&opts, "user-agent", c->user_agent, 0);
+ av_dict_set(&opts, "cookies", c->cookies, 0);
+ av_dict_set(&opts, "headers", c->headers, 0);
+
+ ret = avio_open2(&in, url, AVIO_FLAG_READ,
+ c->interrupt_callback, &opts);
+ av_dict_free(&opts);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
+ c->base_url = av_strdup(new_url);
+ } else {
+ c->base_url = av_strdup(url);
+ }
+
+ filesize = avio_size(in);
+ if (filesize <= 0){
+ filesize = 8 * 1024;
+ }
+
+ buffer = av_mallocz(filesize);
+
+ if (!buffer) {
+ return AVERROR(ENOMEM);
+ }
+
+ filesize = avio_read(in, buffer, filesize);
+ if (filesize > 0) {
+ xmlDoc *doc = NULL;
+ xmlNodePtr root_element = NULL;
+ xmlNodePtr node = NULL;
+ xmlNodePtr periodNode = NULL;
+ xmlNodePtr periodSegmentListNode = NULL;
+ xmlNodePtr mpdBaseUrlNode = NULL;
+ xmlNodePtr periodBaseUrlNode = NULL;
+ xmlNodePtr adaptionSetNode = NULL;
+ xmlAttrPtr attr = NULL;
+ xmlChar *val = NULL;
+ uint32_t perdiodDurationSec = 0;
+ uint32_t perdiodStartSec = 0;
+
+ int32_t audioRepIdx = 0;
+ int32_t videoRepIdx = 0;
+
+ LIBXML_TEST_VERSION
+
+ doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
+ root_element = xmlDocGetRootElement(doc);
+ node = root_element;
+
+ if (!node) {
+ ret = AVERROR_INVALIDDATA;
+ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
+ goto cleanup;
+ }
+
+ if (node->type != XML_ELEMENT_NODE ||
+ xmlStrcmp(node->name, (const xmlChar *)"MPD")) {
+ ret = AVERROR_INVALIDDATA;
+ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
+ goto cleanup;
+ }
+
+ val = xmlGetProp(node, "type");
+ if (!val) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
+ ret = AVERROR_INVALIDDATA;
+ goto cleanup;
+ }
+ if (!xmlStrcmp(val, (const xmlChar *)"dynamic"))
+ c->is_live = 1;
+ xmlFree(val);
+
+ attr = node->properties;
+ while(attr) {
+ val = xmlGetProp(node, attr->name);
+
+ if (!xmlStrcmp(attr->name, (const xmlChar *)"availabilityStartTime"))
+ c->availabilityStartTimeSec = GetUTCDateTimeInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"publishTime"))
+ c->publishTimeSec = GetUTCDateTimeInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"minimumUpdatePeriod"))
+ c->minimumUpdatePeriodSec = GetDurationInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"timeShiftBufferDepth"))
+ c->timeShiftBufferDepthSec = GetDurationInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"minBufferTime"))
+ c->minBufferTimeSec = GetDurationInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"suggestedPresentationDelay"))
+ c->suggestedPresentationDelaySec = GetDurationInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"mediaPresentationDuration"))
+ c->mediaPresentationDurationSec = GetDurationInSec((const char *)val);
+
+ attr = attr->next;
+
+ xmlFree(val);
+ }
+
+ mpdBaseUrlNode = findChildNodeByName(node, "BaseURL");
+
+ // at now we can handle only one period, with the longest duration
+ node = xmlFirstElementChild(node);
+ while (node) {
+ if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) {
+ perdiodDurationSec = 0;
+ perdiodStartSec = 0;
+ attr = node->properties;
+ while(attr) {
+ val = xmlGetProp(node, attr->name);
+
+ if (!xmlStrcmp(attr->name, (const xmlChar *)"duration"))
+ perdiodDurationSec = GetDurationInSec((const char *)val);
+ else if (!xmlStrcmp(attr->name, (const xmlChar *)"start"))
+ perdiodStartSec = GetDurationInSec((const char *)val);
+ attr = attr->next;
+
+ xmlFree(val);
+ }
+
+ if ((perdiodDurationSec) >= (c->periodDurationSec)) {
+ periodNode = node;
+ c->periodDurationSec = perdiodDurationSec;
+ c->periodStartSec = perdiodStartSec;
+ if (c->periodStartSec > 0)
+ c->mediaPresentationDurationSec = c->periodDurationSec;
+ }
+ }
+
+ node = xmlNextElementSibling(node);
+ }
+
+ if (!periodNode) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
+ ret = AVERROR_INVALIDDATA;
+ goto cleanup;
+ }
+
+ // explore AdaptationSet
+ adaptionSetNode = xmlFirstElementChild(periodNode);
+ while (adaptionSetNode) {
+ if (!xmlStrcmp(adaptionSetNode->name, (const xmlChar *)"BaseURL")) {
+ periodBaseUrlNode = adaptionSetNode;
+ } else if (!xmlStrcmp(adaptionSetNode->name, (const xmlChar *)"SegmentList")) {
+ periodSegmentListNode = adaptionSetNode;
+ } else if (!xmlStrcmp(adaptionSetNode->name, (const xmlChar *)"AdaptationSet")) {
+ xmlNodePtr segmentTemplateNode = NULL;
+ xmlNodePtr contentComponentNode = NULL;
+ xmlNodePtr adaptionSetBaseUrlNode = NULL;
+ xmlNodePtr adaptionSetSegmentListNode = NULL;
+
+ node = xmlFirstElementChild(adaptionSetNode);
+ while (node) {
+ if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) {
+ segmentTemplateNode = node;
+ } else if (!xmlStrcmp(node->name, (const xmlChar *)"ContentComponent")) {
+ contentComponentNode = node;
+ } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) {
+ adaptionSetBaseUrlNode = node;
+ } else if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentList")) {
+ adaptionSetSegmentListNode = node;
+ } else if (!xmlStrcmp(node->name, (const xmlChar *)"Representation")) {
+ xmlNodePtr representationNode = node;
+ xmlChar *rep_id_val = xmlGetProp(representationNode, "id");
+ xmlChar *rep_bandwidth_val = xmlGetProp(representationNode, "bandwidth");
+ enum RepType type = REP_TYPE_UNSPECIFIED;
+
+
+ // try get information from representation
+ if (type == REP_TYPE_UNSPECIFIED)
+ type = get_content_type(representationNode);
+ // try get information from contentComponen
+ if (type == REP_TYPE_UNSPECIFIED)
+ type = get_content_type(contentComponentNode);
+ // try get information from adaption set
+ if (type == REP_TYPE_UNSPECIFIED)
+ type = get_content_type(adaptionSetNode);
+
+ if (type == REP_TYPE_UNSPECIFIED) {
+ av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
+ } else if ( (type == REP_TYPE_VIDEO && ((c->video_rep_index < 0 && !c->cur_video) || videoRepIdx == (int32_t)c->video_rep_index )) ||
+ (type == REP_TYPE_AUDIO && ((c->audio_rep_index < 0 && !c->cur_audio) || audioRepIdx == (int32_t)c->audio_rep_index )) ) {
+
+ // convert selected representation to our internal struct
+ struct representation *rep = av_mallocz(sizeof(struct representation));
+ xmlNodePtr representationSegmentTemplateNode = findChildNodeByName(representationNode, "SegmentTemplate");
+ xmlNodePtr representationBaseUrlNode = findChildNodeByName(representationNode, "BaseURL");
+ xmlNodePtr representationSegmentListNode = findChildNodeByName(representationNode, "SegmentList");
+ reset_packet(&rep->pkt);
+ if (representationSegmentTemplateNode || segmentTemplateNode) {
+
+ xmlNodePtr segmentTemplatesTab[2] = {representationSegmentTemplateNode, segmentTemplateNode};
+ xmlChar *duration_val = get_val_from_nodes_tab(segmentTemplatesTab, 2, "duration");
+ xmlChar *startNumber_val = get_val_from_nodes_tab(segmentTemplatesTab, 2, "startNumber");
+ xmlChar *timescale_val = get_val_from_nodes_tab(segmentTemplatesTab, 2, "timescale");
+
+ xmlChar *initialization_val = get_val_from_nodes_tab(segmentTemplatesTab, 2, "initialization");
+ xmlChar *media_val = get_val_from_nodes_tab(segmentTemplatesTab, 2, "media");
+
+ xmlNodePtr baseUrlNodes[4] = {mpdBaseUrlNode, periodBaseUrlNode, adaptionSetBaseUrlNode, representationBaseUrlNode};
+
+ if (initialization_val) {
+ rep->init_section = av_mallocz(sizeof(struct segment));
+ rep->init_section->url = get_content_url(baseUrlNodes, 4, rep_id_val, rep_bandwidth_val, initialization_val);
+ rep->init_section->size = -1;
+ xmlFree(initialization_val);
+ }
+
+ if (media_val) {
+ char *tmp_str = get_content_url(baseUrlNodes, 4, rep_id_val, rep_bandwidth_val, media_val);
+ rep->tmp_url_type = TMP_URL_TYPE_UNSPECIFIED;
+ if (tmp_str) {
+ rep->url_template = tmp_str;
+
+ if (strstr(tmp_str, "$Number") &&
+ 0 == get_repl_pattern_and_format(tmp_str, "$Number$", &(rep->url_template_pattern), &(rep->url_template_format))) {
+ // A URL template is provided from which clients build a chunk list where the chunk URLs include chunk numbers (like index numbers).
+ rep->tmp_url_type = TMP_URL_TYPE_NUMBER; // (Chunk) Number-Based.
+ } else if (strstr(tmp_str, "$Time") &&
+ 0 == get_repl_pattern_and_format(tmp_str, "$Time$", &(rep->url_template_pattern), &(rep->url_template_format))) {
+ // A URL template is provided from which clients build a chunk list where the chunk URLs include chunk start times.
+ rep->tmp_url_type = TMP_URL_TYPE_TIME; // (CTime-Based.
+ }
+ }
+ xmlFree(media_val);
+ }
+
+ if (duration_val) {
+ rep->segmentDuration = (int64_t) atoll((const char *)duration_val);
+ xmlFree(duration_val);
+ }
+
+ if (timescale_val) {
+ rep->segmentTimescalce = (int64_t) atoll((const char *)timescale_val);
+ xmlFree(timescale_val);
+ }
+
+ if (startNumber_val) {
+ rep->first_seq_no = (int64_t) atoll((const char *)startNumber_val);
+ xmlFree(startNumber_val);
+ }
+
+ fill_timelines(rep, segmentTemplatesTab, 2);
+ } else if (representationBaseUrlNode && !representationSegmentListNode) {
+ xmlNodePtr baseUrlNodes[4] = {mpdBaseUrlNode, periodBaseUrlNode, adaptionSetBaseUrlNode, representationBaseUrlNode};
+ struct segment *seg = av_mallocz(sizeof(struct segment));
+ seg->url = get_content_url(baseUrlNodes, 4, rep_id_val, rep_bandwidth_val, NULL);
+ seg->size = -1;
+ dynarray_add(&rep->segments, &rep->n_segments, seg);
+ } else if (representationSegmentListNode) {
+ // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
+ // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?segmentlength=15&type=full
+ xmlNodePtr segmentUrlNode = NULL;
+ xmlNodePtr segmentListTab[3] = {representationSegmentListNode, adaptionSetSegmentListNode, periodSegmentListNode};
+ xmlChar *duration_val = get_val_from_nodes_tab(segmentListTab, 3, "duration");
+ xmlChar *startNumber_val = get_val_from_nodes_tab(segmentListTab, 3, "startNumber");
+ xmlChar *timescale_val = get_val_from_nodes_tab(segmentListTab, 3, "timescale");
+
+ if (duration_val) {
+ rep->segmentDuration = (int64_t) atoll((const char *)duration_val);
+ xmlFree(duration_val);
+ }
+
+ if (timescale_val) {
+ rep->segmentTimescalce = (int64_t) atoll((const char *)timescale_val);
+ xmlFree(timescale_val);
+ }
+
+ if (startNumber_val) {
+ rep->start_number = (int64_t) atoll((const char *)startNumber_val);
+ xmlFree(startNumber_val);
+ }
+
+ segmentUrlNode = xmlFirstElementChild(representationSegmentListNode);
+ while (segmentUrlNode) {
+ if (!xmlStrcmp(segmentUrlNode->name, (const xmlChar *)"Initialization")) {
+ xmlChar *initialization_val = xmlGetProp(segmentUrlNode, "sourceURL");
+ if (initialization_val) {
+ xmlNodePtr baseUrlNodes[4] = {mpdBaseUrlNode, periodBaseUrlNode, adaptionSetBaseUrlNode, representationBaseUrlNode};
+ rep->init_section = av_mallocz(sizeof(struct segment));
+ rep->init_section->url = get_content_url(baseUrlNodes, 4, rep_id_val, rep_bandwidth_val, initialization_val);
+ rep->init_section->size = -1;
+ xmlFree(initialization_val);
+ }
+ } else if (!xmlStrcmp(segmentUrlNode->name, (const xmlChar *)"SegmentURL")) {
+ xmlChar *media_val = xmlGetProp(segmentUrlNode, "media");
+ if (media_val) {
+ xmlNodePtr baseUrlNodes[4] = {mpdBaseUrlNode, periodBaseUrlNode, adaptionSetBaseUrlNode, representationBaseUrlNode};
+ struct segment *seg = av_mallocz(sizeof(struct segment));
+ seg->url = get_content_url(baseUrlNodes, 4, rep_id_val, rep_bandwidth_val, media_val);
+ seg->size = -1;
+ dynarray_add(&rep->segments, &rep->n_segments, seg);
+ xmlFree(media_val);
+ }
+ }
+ segmentUrlNode = xmlNextElementSibling(segmentUrlNode);
+ }
+
+ fill_timelines(rep, segmentListTab, 2);
+ } else {
+ free_representation(rep);
+ rep = NULL;
+ av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
+ }
+
+ if (rep) {
+ if (rep->segmentDuration > 0 && rep->segmentTimescalce == 0)
+ rep->segmentTimescalce = 1;
+
+ if (type == REP_TYPE_VIDEO) {
+ rep->rep_idx = videoRepIdx;
+ c->cur_video = rep;
+ }
+ else {
+ rep->rep_idx = audioRepIdx;
+ c->cur_audio = rep;
+ }
+ }
+ }
+
+ if (type == REP_TYPE_VIDEO) {
+ videoRepIdx += 1;
+ } if (type == REP_TYPE_AUDIO) {
+ audioRepIdx += 1;
+ }
+
+ if (rep_id_val)
+ xmlFree(rep_id_val);
+
+ if (rep_bandwidth_val)
+ xmlFree(rep_bandwidth_val);
+ }
+ node = xmlNextElementSibling(node);
+ }
+ }
+ adaptionSetNode = xmlNextElementSibling(adaptionSetNode);
+ }
+
+ if (c->cur_video) {
+ c->cur_video->rep_count = videoRepIdx;
+ c->cur_video->fix_multiple_stsd_order = 1;
+
+ av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", (int)c->cur_video->rep_idx);
+ av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", (int)videoRepIdx);
+ }
+
+ if (c->cur_audio) {
+ c->cur_audio->rep_count = audioRepIdx;
+ }
+
+cleanup:
+ /*free the document */
+ xmlFreeDoc(doc);
+ xmlCleanupParser();
+
+ } else {
+ av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
+ ret = AVERROR_INVALIDDATA;
+ }
+
+ av_free(new_url);
+ av_free(buffer);
+ if (close_in) {
+ avio_close(in);
+ }
+ return ret;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
+static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
+{
+ int64_t startTime = 0;
+ if (pls->n_timelines) {
+ int64_t i = 0;
+ int64_t j = 0;
+ int64_t num = 0;
+
+ for (i=0; i<pls->n_timelines; ++i) {
+ if (pls->timelines[i]->t > 0) {
+ startTime = pls->timelines[i]->t;
+ }
+
+ if (num == cur_seq_no)
+ goto finish;
+
+ startTime += pls->timelines[i]->d;
+
+ for (j = 0; j < pls->timelines[i]->r; ++j) {
+ num += 1;
+ if (num == cur_seq_no)
+ goto finish;
+ startTime += pls->timelines[i]->d;
+ }
+ num += 1;
+
+ }
+ }
+finish:
+ return startTime;
+}
+
+static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t currentTime)
+{
+ int64_t i = 0;
+ int64_t j = 0;
+ int64_t num = 0;
+ int64_t startTime = 0;
+
+ for (i=0; i<pls->n_timelines; ++i) {
+ if (pls->timelines[i]->t > 0) {
+ startTime = pls->timelines[i]->t;
+ }
+
+ if (startTime > currentTime)
+ goto finish;
+
+ startTime += pls->timelines[i]->d;
+
+ for (j = 0; j < pls->timelines[i]->r; ++j) {
+ num += 1;
+ if (startTime > currentTime)
+ goto finish;
+ startTime += pls->timelines[i]->d;
+ }
+ num += 1;
+ }
+
+ return -1;
+
+finish:
+ return num;
+}
+
+static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c);
+
+static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
+{
+ if (rep_dest != NULL && rep_src != NULL) {
+ free_timelines_list(rep_dest);
+ rep_dest->timelines = rep_src->timelines;
+ rep_dest->n_timelines = rep_src->n_timelines;
+ rep_dest->first_seq_no = rep_src->first_seq_no;
+
+ rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
+
+ rep_src->timelines = NULL;
+ rep_src->n_timelines = 0;
+ rep_dest->cur_seq_no = rep_src->cur_seq_no;
+ }
+}
+
+static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
+{
+ if (rep_dest != NULL && rep_src != NULL) {
+
+ free_segment_list(rep_dest);
+
+ if (rep_src->start_number > (rep_dest->start_number + rep_dest->cur_seq_no))
+ rep_dest->cur_seq_no = 0;
+ else
+ rep_dest->cur_seq_no = rep_src->n_segments - ((rep_src->start_number + rep_src->n_segments) - (rep_dest->start_number + rep_dest->cur_seq_no));
+
+ rep_dest->segments = rep_src->segments;
+ rep_dest->n_segments = rep_src->n_segments;
+ rep_dest->start_number = rep_src->start_number;
+
+ rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
+
+ rep_src->segments = NULL;
+ rep_src->n_segments = 0;
+ }
+}
+
+static int refresh_manifest(AVFormatContext *s)
+{
+ int ret = 0;
+ DASHContext *c = s->priv_data;
+
+ // save current context
+ struct representation *cur_video = c->cur_video;
+ struct representation *cur_audio = c->cur_audio;
+ char *base_url = c->base_url;
+
+ c->base_url = NULL;
+ c->cur_video = NULL;
+ c->cur_audio = NULL;
+
+ ret = parse_mainifest(s, s->filename, NULL);
+ if (ret != 0)
+ goto finish;
+
+ if (cur_video && cur_video->timelines || cur_audio && cur_audio->timelines)
+ {
+ // calc current time
+ int64_t currentVideoTime = 0;
+ int64_t currentAudioTime = 0;
+
+ if (cur_video && cur_video->timelines)
+ currentVideoTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->segmentTimescalce;
+
+ if (cur_audio && cur_audio->timelines)
+ currentAudioTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->segmentTimescalce;
+
+ // update segments
+ if (cur_video && cur_video->timelines) {
+ c->cur_video->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_video, currentVideoTime * cur_video->segmentTimescalce - 1);
+ if (c->cur_video->cur_seq_no >= 0)
+ move_timelines(c->cur_video, cur_video, c);
+ }
+
+ if (cur_audio && cur_audio->timelines) {
+ c->cur_audio->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_audio, currentAudioTime * cur_audio->segmentTimescalce - 1);
+ if (c->cur_audio->cur_seq_no >= 0)
+ move_timelines(c->cur_audio, cur_audio, c);
+ }
+ }
+
+ if (cur_video && cur_video->segments) {
+ move_segments(c->cur_video, cur_video, c);
+ }
+
+ if (cur_audio && cur_audio->segments) {
+ move_segments(c->cur_audio, cur_audio, c);
+ }
+
+finish:
+ // restore context
+ if (c->base_url)
+ av_free(base_url);
+ else
+ c->base_url = base_url;
+
+ if (c->cur_audio)
+ free_representation(c->cur_audio);
+
+ if (c->cur_video)
+ free_representation(c->cur_video);
+
+ c->cur_audio = cur_audio;
+ c->cur_video = cur_video;
+
+ return ret;
+}
+
+
+static int64_t calc_cur_seg_no(struct representation *pls, DASHContext *c)
+{
+ int64_t num = 0;
+ if (c->is_live) {
+ if (pls->n_segments) {
+ // handle segment number here
+ num = pls->first_seq_no;
+ } else if (pls->n_timelines) {
+ int64_t startTimeOffset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - pls->timelines[pls->first_seq_no]->t; // total duration of playlist
+ if (startTimeOffset < 60*pls->segmentTimescalce)
+ startTimeOffset = 0;
+ else
+ startTimeOffset = startTimeOffset - 60*pls->segmentTimescalce;
+
+ num = calc_next_seg_no_from_timelines(pls, pls->timelines[pls->first_seq_no]->t + startTimeOffset);
+ if (num == -1)
+ num = pls->first_seq_no;
+ }
+ else {
+ num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availabilityStartTimeSec) - c->presentationDelaySec) * pls->segmentTimescalce) / pls->segmentDuration;
+ }
+ } else {
+ num = pls->first_seq_no;
+ }
+ return num;
+}
+
+static int64_t calc_min_seg_no(struct representation *pls, DASHContext *c)
+{
+ int64_t num = 0;
+ if (c->is_live && pls->segmentDuration) {
+ num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availabilityStartTimeSec) - c->timeShiftBufferDepthSec) * pls->segmentTimescalce) / pls->segmentDuration;
+ } else {
+ num = pls->first_seq_no;
+ }
+ return num;
+}
+
+static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
+{
+ int64_t num = 0;
+
+ if (pls->n_segments) {
+ num = pls->first_seq_no + pls->n_segments - 1;
+ } else if (pls->n_timelines) {
+ int i = 0;
+ num = pls->first_seq_no + pls->n_timelines - 1;
+ for (i=0; i<pls->n_timelines; ++i) {
+ num += pls->timelines[i]->r;
+ }
+ }
+ else if (c->is_live) {
+ num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availabilityStartTimeSec)) * pls->segmentTimescalce) / pls->segmentDuration;
+ }
+ else {
+ num = pls->first_seq_no + (c->mediaPresentationDurationSec * pls->segmentTimescalce) / pls->segmentDuration;
+ }
+
+ return num;
+}
+
+static struct segment *get_current_segment(struct representation *pls)
+{
+ struct segment *seg = NULL;
+ DASHContext *c = pls->parent->priv_data;
+
+ while (!ff_check_interrupt(c->interrupt_callback) && pls->n_segments > 0) {
+ if (pls->cur_seq_no < pls->n_segments) {
+ struct segment *seg_ptr = pls->segments[pls->cur_seq_no];
+ seg = av_mallocz(sizeof(struct segment));
+ seg->url = av_strdup(seg_ptr->url);
+ seg->size = seg_ptr->size;
+ seg->url_offset = seg_ptr->url_offset;
+ return seg;
+ } else if (c->is_live) {
+ sleep(2);
+ refresh_manifest(pls->parent);
+ } else
+ break;
+ }
+
+ if (c->is_live) {
+ while (!ff_check_interrupt(c->interrupt_callback)) {
+ int64_t min_seq_no = calc_min_seg_no(pls, c);
+ int64_t max_seq_no = calc_max_seg_no(pls, c);
+
+ if (pls->cur_seq_no <= min_seq_no) {
+ av_log(pls->parent, AV_LOG_VERBOSE, "%s to old segment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", __FUNCTION__, (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx);
+ if (c->is_live && (pls->timelines || pls->segments)) {
+ refresh_manifest(pls->parent);
+ }
+ pls->cur_seq_no = calc_cur_seg_no(pls, c);
+ } else if (pls->cur_seq_no > max_seq_no) {
+ av_log(pls->parent, AV_LOG_VERBOSE, "%s wait for new segment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", __FUNCTION__, min_seq_no, max_seq_no, (int)pls->rep_idx);
+ sleep(2);
+ if (c->is_live && (pls->timelines || pls->segments)) {
+ refresh_manifest(pls->parent);
+ }
+ continue;
+ }
+ break;
+ }
+ seg = av_mallocz(sizeof(struct segment));
+ } else if (pls->cur_seq_no <= pls->last_seq_no) {
+ seg = av_mallocz(sizeof(struct segment));
+ }
+
+ if (seg) {
+ if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) {
+ int64_t val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ? pls->cur_seq_no : get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no);
+ int size = snprintf(NULL, 0, pls->url_template_format, val); // calc needed buffer size
+
+ if (size > 0) {
+ char *tmp_val = av_mallocz(size + 1);
+ snprintf(tmp_val, size+1, pls->url_template_format, val);
+ seg->url = repl_str(pls->url_template, pls->url_template_pattern, tmp_val);
+ av_free(tmp_val);
+ }
+ }
+
+ if (!seg->url) {
+ av_log(pls->parent, AV_LOG_ERROR, "Unable to resolve template url '%s'\n", pls->url_template);
+ seg->url = av_strdup(pls->url_template);
+ }
+ seg->size = -1;
+ }
+
+ return seg;
+}
+
+enum ReadFromURLMode {
+ READ_NORMAL,
+ READ_COMPLETE,
+};
+
+static int read_from_url(struct representation *pls, struct segment *seg,
+ uint8_t *buf, int buf_size,
+ enum ReadFromURLMode mode)
+{
+ int ret;
+
+ /* limit read if the segment was only a part of a file */
+ if (seg->size >= 0)
+ buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
+
+ if (mode == READ_COMPLETE) {
+ ret = avio_read(pls->input, buf, buf_size);
+ if (ret != buf_size)
+ av_log(NULL, AV_LOG_ERROR, "Could not read complete segment buf_size[%d] ret[%d].\n", buf_size, ret);
+ } else if (buf_size > 0)
+ ret = avio_read(pls->input, buf, buf_size);
+ else
+ ret = AVERROR_EOF;
+
+ if (ret > 0)
+ pls->cur_seg_offset += ret;
+
+ return ret;
+}
+
+static int open_input(DASHContext *c, struct representation *pls, struct segment *seg)
+{
+ AVDictionary *opts = NULL;
+ char url[MAX_URL_SIZE];
+ int ret;
+
+ // broker prior HTTP options that should be consistent across requests
+ av_dict_set(&opts, "user-agent", c->user_agent, 0);
+ av_dict_set(&opts, "cookies", c->cookies, 0);
+ av_dict_set(&opts, "headers", c->headers, 0);
+ if (c->is_live) {
+ av_dict_set(&opts, "seekable", "0", 0);
+ }
+
+ if (seg->size >= 0) {
+ /* try to restrict the HTTP request to the part we want
+ * (if this is in fact a HTTP request) */
+ av_dict_set_int(&opts, "offset", seg->url_offset, 0);
+ av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
+ }
+
+ ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url);
+
+ av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
+ url, seg->url_offset, pls->rep_idx);
+
+ ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
+ if (ret < 0) {
+ goto cleanup;
+ }
+
+ /* Seek to the requested position. If this was a HTTP request, the offset
+ * should already be where want it to, but this allows e.g. local testing
+ * without a HTTP server. */
+ if (ret == 0 && seg->url_offset) {
+ int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
+ if (seekret < 0) {
+ av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of DASH segment '%s'\n", seg->url_offset, seg->url);
+ ret = (int) seekret;
+ ff_format_io_close(pls->parent, &pls->input);
+ }
+ }
+
+cleanup:
+ av_dict_free(&opts);
+ pls->cur_seg_offset = 0;
+ pls->cur_seg_size = seg->size;
+ return ret;
+}
+
+static int update_init_section(struct representation *pls)
+{
+ static const int max_init_section_size = 1024*1024;
+ DASHContext *c = pls->parent->priv_data;
+ int64_t sec_size;
+ int64_t urlsize;
+ int ret;
+
+ /* read init section only once per representation */
+ if (!pls->init_section || pls->init_sec_buf) {
+ return 0;
+ }
+
+ ret = open_input(c, pls, pls->init_section);
+ if (ret < 0) {
+ av_log(pls->parent, AV_LOG_WARNING,
+ "Failed to open an initialization section in playlist %d\n",
+ pls->rep_idx);
+ return ret;
+ }
+
+ if (pls->init_section->size >= 0)
+ sec_size = pls->init_section->size;
+ else if ((urlsize = avio_size(pls->input)) >= 0)
+ sec_size = urlsize;
+ else
+ sec_size = max_init_section_size;
+
+ av_log(pls->parent, AV_LOG_DEBUG,
+ "Downloading an initialization section of size %"PRId64"\n",
+ sec_size);
+
+ sec_size = FFMIN(sec_size, max_init_section_size);
+
+ av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
+
+ ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
+ pls->init_sec_buf_size, READ_COMPLETE);
+ ff_format_io_close(pls->parent, &pls->input);
+
+ if (ret < 0)
+ return ret;
+ if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) {
+ uint8_t **stsd_entries = NULL;
+ int *stsd_entries_size = NULL;
+
+ int i = 4;
+ while(i <= ret-4) {
+ // find start stsd atom
+ if (0 == memcmp(pls->init_sec_buf + i, "stsd", 4)) {
+ // 1B version
+ // 3B flags
+ // 4B num of entries
+ int stsd_first_offset = i + 8;
+ int stsd_offset = 0;
+ int j = 0;
+ uint32_t stsd_count = AV_RB32(pls->init_sec_buf + stsd_first_offset);
+ stsd_first_offset += 4;
+ if (stsd_count != pls->rep_count) {
+ i += 1;
+ continue;
+ }
+
+ // find all stsd entries
+ stsd_entries = av_mallocz_array(stsd_count, sizeof(*stsd_entries));
+ stsd_entries_size = av_mallocz_array(stsd_count, sizeof(*stsd_entries_size));
+ for (j=0; j<stsd_count; ++j) {
+ // 4B - size
+ // 4B - format
+ stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + stsd_first_offset + stsd_offset);
+ stsd_entries[j] = av_malloc(stsd_entries_size[j]);
+ memcpy(stsd_entries[j], pls->init_sec_buf + stsd_first_offset + stsd_offset, stsd_entries_size[j]);
+ stsd_offset += stsd_entries_size[j];
+ }
+
+ // reorder stsd entries
+ // as first put stsd entry for current representation
+ j = pls->rep_idx;
+ stsd_offset = stsd_first_offset;
+ memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]);
+ stsd_offset += stsd_entries_size[j];
+
+ for (j=0; j<stsd_count; ++j) {
+ if (j != pls->rep_idx) {
+ memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]);
+ stsd_offset += stsd_entries_size[j];
+ }
+ av_free(stsd_entries[j]);
+ }
+
+ av_freep(&stsd_entries);
+ av_freep(&stsd_entries_size);
+ break;
+ }
+ i += 1;
+ }
+ }
+
+ av_log(pls->parent, AV_LOG_TRACE, "%s pls[%p] init section size[%d]\n", __FUNCTION__, pls, (int)ret);
+ pls->init_sec_data_len = ret;
+ pls->init_sec_buf_read_offset = 0;
+
+ return 0;
+}
+
+static int64_t seek_data(void *opaque, int64_t offset, int whence)
+{
+ struct representation *v = opaque;
+ if (v->n_segments == 1 && 0 == v->init_sec_data_len) {
+ return avio_seek(v->input, offset, whence);
+ }
+
+ return AVERROR(ENOSYS);
+}
+
+static int read_data(void *opaque, uint8_t *buf, int buf_size)
+{
+ struct representation *v = opaque;
+ DASHContext *c = v->parent->priv_data;
+ int ret = 0;
+restart:
+ if (!v->input) {
+ free_segment(&v->cur_seg);
+ v->cur_seg = get_current_segment(v);
+ if (!v->cur_seg) {
+ ret = AVERROR_EOF;
+ goto end;
+ }
+
+ /* load/update Media Initialization Section, if any */
+ ret = update_init_section(v);
+ if (ret)
+ goto end;
+
+ ret = open_input(c, v, v->cur_seg);
+ if (ret < 0) {
+ if (ff_check_interrupt(c->interrupt_callback)) {
+ goto end;
+ ret = AVERROR_EXIT;
+ }
+ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
+ v->rep_idx);
+ if (c->is_live && (v->timelines || v->segments)) {
+ // refresh_manifest(v->parent);
+ sleep(1);
+ }
+ else {
+ v->cur_seq_no += 1;
+ }
+ goto restart;
+ }
+ }
+
+ if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
+ /* Push init section out first before first actual segment */
+ int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
+ memcpy(buf, v->init_sec_buf, copy_size);
+ v->init_sec_buf_read_offset += copy_size;
+ ret = copy_size;
+ goto end;
+ }
+
+ if (!v->cur_seg) {
+ v->cur_seg = get_current_segment(v);
+ }
+
+ if (!v->cur_seg) {
+ ret = AVERROR_EOF;
+ goto end;
+ }
+
+ ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
+ if (ret > 0)
+ goto end;
+
+ /* This is needed to free indexes from previously processed segments.
+ * Maybe we should restart context every few segments?
+ */
+ if (!v->is_restart_needed)
+ v->cur_seq_no += 1;
+ v->is_restart_needed = 1;
+
+ // ff_format_io_close(v->parent, &v->input);
+ // v->cur_seq_no += 1;
+ // goto restart;
+end:
+ return ret;
+}
+
+static int save_avio_options(AVFormatContext *s)
+{
+ DASHContext *c = s->priv_data;
+ const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
+ uint8_t *buf = NULL;
+ int ret = 0;
+
+ while (*opt) {
+ if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
+ if (buf != NULL && buf[0] != '\0') {
+ ret = av_dict_set(&c->avio_opts, *opt, buf,
+ AV_DICT_DONT_STRDUP_VAL);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ opt++;
+ }
+
+ return ret;
+}
+
+static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
+ int flags, AVDictionary **opts)
+{
+ av_log(s, AV_LOG_ERROR,
+ "A DASH playlist item '%s' referred to an external file '%s'. "
+ "Opening this file was forbidden for security reasons\n",
+ s->filename, url);
+ return AVERROR(EPERM);
+}
+
+static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
+{
+ DASHContext *c = s->priv_data;
+ AVInputFormat *in_fmt = NULL;
+ AVDictionary *in_fmt_opts = NULL;
+ uint8_t *avio_ctx_buffer = NULL;
+ int ret = 0;
+
+ if (pls->ctx) {
+ /* note: the internal buffer could have changed, and be != avio_ctx_buffer */
+ av_freep(&pls->pb.buffer);
+ memset(&pls->pb, 0x00, sizeof(AVIOContext));
+
+ pls->ctx->pb = NULL;
+ avformat_close_input(&pls->ctx);
+ pls->ctx = NULL;
+ }
+
+ if (!(pls->ctx = avformat_alloc_context())) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
+ if (!avio_ctx_buffer ){
+ ret = AVERROR(ENOMEM);
+ avformat_free_context(pls->ctx);
+ pls->ctx = NULL;
+ goto fail;
+ }
+
+ if (c->is_live) {
+ ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls,
+ read_data, NULL, NULL);
+ } else {
+ ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls,
+ read_data, NULL, seek_data);
+ }
+
+ pls->pb.seekable = 0;
+
+ if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
+ goto fail;
+
+ pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
+ pls->ctx->probesize = 1024 * 4;
+ pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
+ /////////////////
+#if 1
+ ret = av_probe_input_buffer(&pls->pb, &in_fmt, "",
+ NULL, 0, 0);
+ if (ret < 0) {
+ av_log(s, AV_LOG_ERROR, "Error when loading first segment, playlist %d\n", (int)pls->rep_idx);
+ avformat_free_context(pls->ctx);
+ pls->ctx = NULL;
+ goto fail;
+ }
+#else
+ in_fmt = av_find_input_format("mp4");
+#endif
+
+ pls->ctx->pb = &pls->pb;
+ pls->ctx->io_open = nested_io_open;
+ ////////////////////
+
+ // provide additional information from mpd if available
+ // av_dict_set(&in_fmt_opts, "video_size", "640x480", 0);
+ // av_dict_set(&in_fmt_opts, "pixel_format", "rgb24", 0);
+ ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
+ av_dict_free(&in_fmt_opts);
+ if (ret < 0)
+ goto fail;
+
+ if (pls->n_segments == 1) {
+ //pls->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
+ ret = avformat_find_stream_info(pls->ctx, NULL);
+ if (ret < 0)
+ goto fail;
+ }
+
+ av_log(pls->parent, AV_LOG_VERBOSE, "%s nb_streams[%d]\n", __FUNCTION__, (int)pls->ctx->nb_streams);
+
+fail:
+ return ret;
+}
+
+static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
+{
+ int ret = 0;
+ int i;
+
+ pls->parent = s;
+ pls->cur_seq_no = calc_cur_seg_no(pls, s->priv_data);
+ pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
+
+
+ ret = reopen_demux_for_component(s, pls);
+ if (ret < 0) {
+ goto fail;
+ }
+
+ for (i = 0; i < pls->ctx->nb_streams; i++) {
+ AVStream *st = avformat_new_stream(s, NULL);
+ AVStream *ist = pls->ctx->streams[i];
+ if (!st) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ st->id = i;
+
+ // avcodec_copy_context(st->codec, pls->ctx->streams[i]->codec);
+ avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar);
+ avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
+ }
+
+ return 0;
+fail:
+ return ret;
+}
+
+static int dash_read_header(AVFormatContext *s)
+{
+ void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
+ DASHContext *c = s->priv_data;
+ int ret = 0;
+ int stream_index = 0;
+
+ c->interrupt_callback = &s->interrupt_callback;
+
+ // if the URL context is good, read important options we must broker later
+ if (u) {
+ update_options(&c->user_agent, "user-agent", u);
+ update_options(&c->cookies, "cookies", u);
+ update_options(&c->headers, "headers", u);
+ }
+
+ if ((ret = parse_mainifest(s, s->filename, s->pb)) < 0)
+ goto fail;
+
+ if ((ret = save_avio_options(s)) < 0)
+ goto fail;
+
+ /* If this isn't a live stream, fill the total duration of the
+ * stream. */
+ if (!c->is_live) {
+ s->duration = (int64_t) c->mediaPresentationDurationSec * AV_TIME_BASE;
+ }
+
+ /* Open the demuxer for curent video and current audio components if available */
+ if (0 == ret && c->cur_video) {
+ ret = open_demux_for_component(s, c->cur_video);
+ if (ret == 0) {
+ c->cur_video->stream_index = stream_index;
+ ++stream_index;
+ } else {
+ free_representation(c->cur_video);
+ c->cur_video = NULL;
+ }
+ }
+
+ if (0 == ret && c->cur_audio) {
+ ret = open_demux_for_component(s, c->cur_audio);
+ if (ret == 0) {
+ c->cur_audio->stream_index = stream_index;
+ ++stream_index;
+ } else {
+ free_representation(c->cur_audio);
+ c->cur_audio = NULL;
+ }
+ }
+
+ if (0 == stream_index) {
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+ /* Create a program */
+ if (0 == ret) {
+ AVProgram *program;
+ program = av_new_program(s, 0);
+ if (!program) {
+ goto fail;
+ }
+
+ if (c->cur_video) {
+ av_program_add_stream_index(s, 0, c->cur_video->stream_index);
+ }
+
+ if (c->cur_audio) {
+ av_program_add_stream_index(s, 0, c->cur_audio->stream_index);
+ }
+ }
+
+ return 0;
+fail:
+ return ret;
+}
+
+static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ DASHContext *c = s->priv_data;
+ int ret = 0;
+ struct representation *cur = NULL;
+
+ if (!c->cur_audio && !c->cur_video) {
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (c->cur_audio && !c->cur_video) {
+ cur = c->cur_audio;
+ } else if (!c->cur_audio && c->cur_video) {
+ cur = c->cur_video;
+ } else if (c->cur_video->cur_timestamp > c->cur_audio->cur_timestamp) {
+ cur = c->cur_audio;
+ } else {
+ cur = c->cur_video;
+ }
+
+ if (cur->ctx) {
+ while (!ff_check_interrupt(c->interrupt_callback) && ret == 0) {
+ ret = av_read_frame(cur->ctx, &cur->pkt);
+
+ if (0 == ret) {
+ /* If we got a packet, return it */
+ *pkt = cur->pkt;
+ cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
+ pkt->stream_index = cur->stream_index;
+ reset_packet(&cur->pkt);
+ return 0;
+ }
+
+ reset_packet(&cur->pkt);
+
+ if (cur->is_restart_needed) {
+ while (!ff_check_interrupt(c->interrupt_callback)) {
+ cur->cur_seg_offset = 0;
+ cur->init_sec_buf_read_offset = 0;
+ if (cur->input)
+ ff_format_io_close(cur->parent, &cur->input);
+ ret = reopen_demux_for_component(s, cur);
+ if (c->is_live && ret != 0) {
+ sleep(2);
+ continue;
+ }
+ break;
+ }
+ cur->is_restart_needed = 0;
+ }
+ }
+ }
+
+ return AVERROR_EOF;
+}
+
+static int dash_close(AVFormatContext *s)
+{
+ DASHContext *c = s->priv_data;
+
+ if (c->cur_audio) {
+ free_representation(c->cur_audio);
+ }
+
+ if (c->cur_video) {
+ free_representation(c->cur_video);
+ }
+
+ av_freep(&c->cookies);
+ av_freep(&c->user_agent);
+ av_dict_free(&c->avio_opts);
+ av_freep(&c->base_url);
+ return 0;
+}
+
+static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seekPosMSec, int flags)
+{
+ int ret = 0;
+
+ av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d\n", seekPosMSec, pls->rep_idx);
+ // single segment mode
+ if (pls->n_segments == 1) {
+ pls->cur_timestamp = 0;
+ pls->cur_seg_offset = 0;
+ ff_read_frame_flush(pls->ctx);
+ return av_seek_frame(pls->ctx, -1, seekPosMSec*1000, flags);
+ }
+
+ if (pls->input)
+ ff_format_io_close(pls->parent, &pls->input);
+
+ // find the nearest segment
+ if (pls->n_timelines > 0 && pls->segmentTimescalce > 0) {
+ int64_t duration = 0;
+ int i;
+ int j;
+ int64_t num = pls->first_seq_no;
+ av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist %d.\n", (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
+ for (i = 0; i < pls->n_timelines; ++i) {
+ if (pls->timelines[i]->t > 0) {
+ duration = pls->timelines[i]->t;
+ }
+
+ duration += pls->timelines[i]->d;
+ if (seekPosMSec < ((duration * 1000) / pls->segmentTimescalce)) {
+ goto set_seq_num;
+ }
+
+ for (j = 0; j < pls->timelines[i]->r; ++j) {
+ duration += pls->timelines[i]->d;
+ num += 1;
+ if (seekPosMSec < ((duration * 1000) / pls->segmentTimescalce)) {
+ goto set_seq_num;
+ }
+ }
+ num += 1;
+ }
+set_seq_num:
+ pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
+ av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n", (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
+ }
+ else if(pls->segmentDuration > 0) {
+ pls->cur_seq_no = pls->first_seq_no + ((seekPosMSec * pls->segmentTimescalce) / pls->segmentDuration) / 1000;
+ } else {
+ av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing segmentDuration\n");
+ pls->cur_seq_no = pls->first_seq_no;
+ }
+ pls->cur_timestamp = 0;
+ pls->cur_seg_offset = 0;
+
+ pls->init_sec_buf_read_offset = 0;
+ ret = reopen_demux_for_component(s, pls);
+
+ return ret;
+}
+
+static int dash_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
+{
+ int ret = 0;
+ DASHContext *c = s->priv_data;
+ int64_t seekPosMSec = av_rescale_rnd(timestamp, 1000,
+ s->streams[stream_index]->time_base.den,
+ flags & AVSEEK_FLAG_BACKWARD ?
+ AV_ROUND_DOWN : AV_ROUND_UP);
+
+ if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
+ return AVERROR(ENOSYS);
+
+ if (c->cur_audio) {
+ ret = dash_seek(s, c->cur_audio, seekPosMSec, flags);
+ }
+
+ if (0 == ret && c->cur_video) {
+ ret = dash_seek(s, c->cur_video, seekPosMSec, flags);
+ }
+
+ return ret;
+}
+
+static int dash_probe(AVProbeData *p)
+{
+ if (!strstr(p->buf, "<MPD"))
+ return 0;
+
+ if (strstr(p->buf, "dash:profile:isoff-on-demand:2011") ||
+ strstr(p->buf, "dash:profile:isoff-live:2011") ||
+ strstr(p->buf, "dash:profile:isoff-live:2012") ||
+ strstr(p->buf, "dash:profile:isoff-main:2011")) {
+ return AVPROBE_SCORE_MAX;
+ }
+
+ if (strstr(p->buf, "dash:profile")) {
+ return AVPROBE_SCORE_MAX / 2;
+ }
+
+ return 0;
+}
+
+#define OFFSET(x) offsetof(DASHContext, x)
+#define FLAGS AV_OPT_FLAG_DECODING_PARAM
+static const AVOption dash_options[] = {
+ {"audio_rep_index", "audio representation index to be used",
+ OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, FLAGS},
+ {"video_rep_index", "video representation index to be used",
+ OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, FLAGS},
+ {NULL}
+};
+
+static const AVClass dash_class = {
+ .class_name = "dash",
+ .item_name = av_default_item_name,
+ .option = dash_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_dash_demuxer = {
+ .name = "dash",
+ .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
+ .priv_class = &dash_class,
+ .priv_data_size = sizeof(DASHContext),
+ .read_probe = dash_probe,
+ .read_header = dash_read_header,
+ .read_packet = dash_read_packet,
+ .read_close = dash_close,
+ .read_seek = dash_read_seek,
+ .flags = AVFMT_NO_BYTE_SEEK,
+};
diff -uNr ffmpeg-3.3_orig/libavformat/Makefile ffmpeg-3.3_dash_demux/libavformat/Makefile
--- ffmpeg-3.3_orig/libavformat/Makefile 2016-12-06 00:28:54.000000000 +0100
+++ ffmpeg-3.3_dash_demux/libavformat/Makefile 2017-10-22 14:30:41.170550487 +0200
@@ -134,6 +134,7 @@
OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o
OBJS-$(CONFIG_DATA_MUXER) += rawenc.o
OBJS-$(CONFIG_DASH_MUXER) += dashenc.o
+OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o
OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o
OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o